Please make sure to change Wire brush with every change of Blade/Cutter. Make sure that wire brush touches blade/cutter making positive contact with the blade gullet. Proper use of wire brush will improve Blade/Cutter life. Chip removing is necessary for better surface finish. Wire brush prevents chip jamming in Blade Guides. ITL Wire Brush 3” Hard Suitable for ITL Nano Machine. ITL Wire Brush 3” Soft Suitable for ITL CSNC Machine. ITL Wire Brush 4” Soft Suitable for ITL CSNC Machine. ITL Wire Brush 6” Hard Suitable for ITL Band Saw Machine.